Refer to the following reaction to answer the following questions.
Refer to the following reaction to answer the following questions.
2 Na(s)+Cl2(g) → 2 NaCl(s)+819 kJ
a. Identify the reaction as being endothermic or exothermic. (Circle one.)
Endothermic _______ Exothermic
b. How many grams of sodium was used if 93.7 kJ of heat is produced?
Homework Answers
2Na(s) + Cl2(g) ---------> 2 NaCl(s)
a) The reaction is Exothermic
formation of ionic compounds from its constituents is exothermic.
b) according to the reaction from 2 moles of sodium and 1 mole of chlorine reacts to form 2 moles of NaCl and releases 819 KJ of heat
93.7 kJ heat will be produced by 0.2288 moles of sodium
so grams of sodium = 0.2288*23 = 5.26 g of sodium
Consider the following reaction: 2Na + Cl2(g) → 2NaCl
Consider the following reaction:2Na + Cl2(g) → 2NaCl ΔH = -821.8 kJ(a) Is the reaction exothermic or endothermic? (b) Calculate the amount of heat transferred when 5.6 g of Na reacts at constant pressure. (c) How many grams of NaCl are produced during an enthalpy change of 16.5 kJ? (d) How many kilojoules of heat are absorbed when 44.1 g of NaCl is decomposed into Na and Cl2 at constant pressure?
How do I solve this? Na(s) + Cl2(9) + 2NaCl(s), AH = -821.8 kJ (a) Is...
How
do I solve this?
Na(s) + Cl2(9) + 2NaCl(s), AH = -821.8 kJ (a) Is this reaction exothermic or endothermic? (b) Calculate the amount of heat transferred when 8.0 g of Na(s) reacts according to this reaction at constant pressure. (c) How many grams of NaCl are produced during an enthalpy change of 10.0 kJ? (d) How many kJ of heat are absorbed when 25.0 g of NaCl(s) is decomposed into Na(s) and Cl2(9) at constant pressure?
How many joules (J) of heat are released when 0.460 g of sodium reacts with chlorine gas?
2Na(s)+Cl2(g) ⟶2NaCl(s)+819 kJWhat is the ΔH for the above reaction? Is the reaction endothermic or exothermic? How many joules (J) of heat are released when 0.460 g of sodium reacts with chlorine gas?
Sodium carbonate is used to manufacture glass. It is obtained by heating sodium bicarbonate as follows:...
Sodium carbonate is used to manufacture glass. It is obtained by heating sodium bicarbonate as follows: 2 NaHCO3 (s) → Na2CO3 (s) + H2O (g) + CO2 (g) ΔH = +129.3 kJ This reaction is (endothermic/exothermic). How many grams of sodium carbonate are produced if 1252 kJ of heat are used to decompose the sodium bicarbonate? g Na2CO3 (4 SF) How much heat is required to decompose 15.65 grams of NaHCO3? kJ (4 SF) Blank 1: Blank 2: Blank 3:
7· (12 points) Consider the following reaction 2 CHOH (8)2CHa()+0() AH 2528 k) (a) Is this...
7· (12 points) Consider the following reaction 2 CHOH (8)2CHa()+0() AH 2528 k) (a) Is this reaction exothermic or endothermic? exothermit (b) Calculate the amount of heat transferred when 24.0 g of CHOH(g) is (c) For a given sample of CHsOH, the enthalpy change during the reaction is 82.1 kJ. How many grams of methane gas CHa are produced? (CH: 16.0 g/mol)
4 Na(s) + O2(g) --> 2 Na2O(s) ΔH0 = - 828 kJ This reaction is _______,...
4 Na(s) + O2(g) --> 2 Na2O(s) ΔH0 = - 828 kJ This reaction is _______, and therefore heat is_____ by the reaction. a)exothermic, absorbed b)exothermic, released c)endothermic, absorbed d)endothermic, released
2. Calculate AH (expressed in kJ/mol) for the following reaction based on the thermochemical information given:...
2. Calculate AH (expressed in kJ/mol) for the following reaction based on the thermochemical information given: Na +Crce → NaCl AH ? Nas) + 2Cl2(g) → Nap + Cle AH = 230 kJ/mol Nag) + Cl → Na(+ Cl® AH = 147 kJ/mol Na(s) + Cl2(e) → NaCl) AH = -411 kJ/mol 3. Consider the reaction: 2HCl) + Ba(OH)2(aq) → BaCl(aq) + 2 H200 AH--118 kJ/mol a. Calculate the heat produced when 700.0 mL of 0.500 M HCl is mixed...
4. Consider the chemical equation for the synthesis of sodium chloride. (0.5 points per blank) 2Na...
4. Consider the chemical equation for the synthesis of sodium chloride. (0.5 points per blank) 2Na (s) + Cl2 (g) -----> 2NaCl(g) How many moles of NaCl can be formed from 2 moles of Na and 1 mole of Cl2? ______mol NaCl If you have 8 moles of Na and 5 moles of Cl2, how many moles of NaCl could be produced? Which reactant limits the amount of product? ________ mol NaCl __________ is the limiting reactant. How many moles...
Consider the following reaction: Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g)...
Consider the following reaction: Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g) ΔHrxn = –4.6 × 102 kJ a. Is this reaction endothermic or exothermic? Circle one. [1] b. How much heat is evolved when 1.37 g of Mg are dissolved in excess HCl? [5] c. If 1.37 g of Mg are dissolved in enough HCl to make 250.0 mL of solution in a coffee-cup calorimeter, what is the final temperature of the solution? (Assume density...
A chemist measures the enthalpy change ΔH during the following reaction: 2Na (s) + Cl2 (g)...
A chemist measures the enthalpy change
ΔH
during the following reaction:
2Na
(s)
+
Cl2
(g)
→
2NaCl
(s)
=ΔH−822.kJ
Use this information to complete the table below. Round each of
your answers to the nearest
/kJmol
.
A chemist measures the enthalpy change AH during the following reaction: 2Na(s) + Cl2(g)→2 NaCl(s) NH=-822. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol reaction △H kJ NaCl(s) → Na(s) + Cl2(g)...
How
do I solve this?
Na(s) + Cl2(9) + 2NaCl(s), AH = -821.8 kJ (a) Is this reaction exothermic or endothermic? (b) Calculate the amount of heat transferred when 8.0 g of Na(s) reacts according to this reaction at constant pressure. (c) How many grams of NaCl are produced during an enthalpy change of 10.0 kJ? (d) How many kJ of heat are absorbed when 25.0 g of NaCl(s) is decomposed into Na(s) and Cl2(9) at constant pressure?
7· (12 points) Consider the following reaction 2 CHOH (8)2CHa()+0() AH 2528 k) (a) Is this reaction exothermic or endothermic? exothermit (b) Calculate the amount of heat transferred when 24.0 g of CHOH(g) is (c) For a given sample of CHsOH, the enthalpy change during the reaction is 82.1 kJ. How many grams of methane gas CHa are produced? (CH: 16.0 g/mol)
2. Calculate AH (expressed in kJ/mol) for the following reaction based on the thermochemical information given: Na +Crce → NaCl AH ? Nas) + 2Cl2(g) → Nap + Cle AH = 230 kJ/mol Nag) + Cl → Na(+ Cl® AH = 147 kJ/mol Na(s) + Cl2(e) → NaCl) AH = -411 kJ/mol 3. Consider the reaction: 2HCl) + Ba(OH)2(aq) → BaCl(aq) + 2 H200 AH--118 kJ/mol a. Calculate the heat produced when 700.0 mL of 0.500 M HCl is mixed...
A chemist measures the enthalpy change
ΔH
during the following reaction:
2Na
(s)
+
Cl2
(g)
→
2NaCl
(s)
=ΔH−822.kJ
Use this information to complete the table below. Round each of
your answers to the nearest
/kJmol
.
A chemist measures the enthalpy change AH during the following reaction: 2Na(s) + Cl2(g)→2 NaCl(s) NH=-822. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol reaction △H kJ NaCl(s) → Na(s) + Cl2(g)...
Most questions answered within 3 hours.
-
1) Who is a Hispanic consumer?
2) Who is a Latin consumer?
3) Are Hispanic and...
asked 54 seconds from now -
Rod figures that it takes an average (mean) of =20 minutes with
a standard deviation of...
asked 17 minutes ago -
You have 5 ul of a pure (undiluted) culture at a concentration
of 3.6 x 106...
asked 21 minutes ago -
______ activity indicates the presence of an electron transport
chain.
1- gelatinase 2- oxidase 3- caseinase...
asked 24 minutes ago -
The molarity of a silver nitrate solution is 0.192 M. How many
grams of silver ions...
asked 37 minutes ago -
Which of the following solutes will produce a greater increase
in boiling point when it is...
asked 33 minutes ago -
true or false: Series connected electrical circuit is a voltage
divider, and voltage of each device...
asked 28 minutes ago -
A 100-W lightbulb has a resistance of about 12 Ω when cold (20
∘C) and 128...
asked 32 minutes ago -
For the asset shown in the following table, use the capital
asset pricing model to find...
asked 33 minutes ago -
If the impulse response of a circuit is a pulse y(t) = u(t) –
u(t-T), T...
asked 39 minutes ago -
Eukaryotic cells have __ which is similar to prokaryotes of
Archaea.
A Ester-linked membrane lipids
B...
asked 49 minutes ago -
true or false. If work is done on a system by it's
surroundings, its value is...
asked 53 minutes ago